The Empire State Building is perhaps best remembered as the site of King Kong's last stand, but in real life, the monkey on the building's back wasn't a giant gorilla -- it was a giant electricity bill. But that was before one of the most remarkable green renovations ever undertaken.

Oil rose to the highest price in more than two years as cold weather in the U.S. and Europe stoked demand.
U.S crude prices for January rose as high as $90.46, the highest since Oct. 2008, Reuters reported.